东北鼠兔小兴安岭亚种的分布和生境

本文通过访问调查和实地调查等方式,对东北鼠兔小兴安岭亚种的分布状况和生境特征进行调查和分析,结果表明:东北鼠兔小兴安岭亚种以点状分布的形式广泛分布于小兴安岭各林区,重点分布区包括五大连池火山岩区和伊春林管局辖区南部和北部;东北鼠兔小兴安岭亚种对生境需求较为特殊,包括生境的基质需要具有较好的孔隙结构,周围需要有草本层等植被条件,基质无浸水,基质需要具有一定的面积,不选择或很少选择蒙古栎林生境。     

毛竹水溶性多糖提取工艺的优化及结构表征

采用响应面法优化毛竹水溶性多糖的提取工艺,分析其成分,并进行结构表征.研究结果表明,优化的毛竹多糖(BSP)提取条件为:料液比1:27(g/mL)、提取温度78℃、提取时间4 h,该条件下BSP提取率为(5.18±0.07)％,提取物中多糖含量为(72.14±0.02)％,糖醛酸含量为(9.76±0.03)％;BSP具...     

农业地租的动态非均衡分析

资本有机构成和地权流转等因素一旦发生变化,马克思农业地租模型的结论就需要重新审视.在坚持劳动价值论和生产价格理论的基础上,运用动态非均衡分析工具,把剩余价值、资本有机构成、地权流转等变量内生化,试图建立起农业绝对地租与级差地租的动态非均衡一般分析框架.     

A Micro-Approach for Testing Marx's LTRPF: Evidence from Greece, 2000 and 2009

This article develops a novel micro-approach for the empirical evaluation of Marx's law of the tendency of the rate of profit to fall. Contrary to the traditional method which uses national macroeconomic data, this approach utilises data taken directly from company reports and accounts. The principal advantage of this approach is that it provides an accurate measurement of the value composition of capital, devoid of the measurement limitations of the traditional method regarding variable capital which stem from the inability to distinguish productive from unproductive labour. A disadvantage, however, is that this approach does not cover the entire national economy. The application of the proposed micro-approach to the ongoing Greek crisis yields results which are congruent with the traditional method and reinforce other recent studies linking the current crisis with low profitability.     

全球化、柔性化、复合化、差异化:信息时代城市功能演变研究

结合信息技术对中国城市影响的实际,从信息技术影响下城市空间相互作用方式、空间结构的构成要素及其影响因素的变化出发,对信息时代国内城市功能特征进行研究变得尤为重要.全球化、柔性化、复合化、差异化已成为信息时代城市功能的主要特征；信息流和接入信息的能力变得尤为重要；每个城市都成为全球或区域城市网络的一个节点；部分服务的区位选择因此也表现出较大的弹性；城市居住空间分异仍然存在,影响因素越来越复杂.     

Endogenous human capital formation,distance to frontier and growth

We examine human capital's contribution to economy-wide technological progress through two channels – imitation and innovation – innovation being more skill-intensive than imitation. We develop a growth model based on the endogenous ability-driven skill acquisition decision of an individual. It is shown that skilled human capital is growth enhancing in the “imitation-innovation” regime and in the “innovation-only” regime whereas unskilled human capital is growth enhancing in the “imitation-only” regime. Steady state exists and, in the long run, the economy converges to the world technology frontier. In the diversified regime, technological progress raises the return to ability and generates an increase in wage inequality between and within groups – consistent with the pattern observed across countries.     

解决两个问题 提高中职生作文质量

制约中职生作文质量的因素很多,涉及的方面很广,提高作文质量要做的工作也很多,但我觉得首先要解决两个问题。第一是要解决学生对作文存在的畏难心理,第二是帮助学生提高运用素材的能力。这是中职生写作文时普遍存在的两个基础问题,而提高运用素材的能力则更为重要。     

Socio‐demographic factors and shared leadership behaviors in dispersed teams: Implications for human resource management

Companies increasingly make use of geographically dispersed teams to capture knowledge residing at different locations. In this context, shared leadership is considered a key enabler of team performance. Taking a functional perspective on shared leadership, we thus investigate the relationship between shared leadership behaviors and team performance in dispersed teams. Furthermore, we analyze how socio‐demographic factors that are characteristic for dispersed teams (i.e., high female‐to‐male ratio, high mean age, and high levels of national diversity) affect shared leadership behaviors. Based on data from 96 dispersed teams, we show that shared leadership behavior fosters team performance. Further, we find the socio‐demographic characteristics typical for dispersed teams to foster shared leadership. Theoretical and managerial implications for human resource management are discussed. © 2012 Wiley Periodicals, Inc.     

试论我国城镇住房保障的制度并轨

尝试性地提出住房保障制度并轨的观点,认为这种并轨应该包括短期并轨和长期并轨两个层面.在短期内,应该推进租售并举的经济适用房发展模式,提高租赁型住房保障比重,逐步将租赁型经济适用房、廉租房、公租房并入到租房保障体系；公积金管理实施“准银行式”的模式,实现保障资金的跨区域流动；长期内,应该构建多层次、梯度性、差异性的租房保障体系.同时,推进租房保障资金的准商业化、市场化运行模式,提高保障资金供给的可持续性.     

The contribution of genetics to milk composition: evidence from Spain

This article focuses on the role that genetic progress may play in improving milk quality. Despite important genetic advances in dairy production, the absence of genetic records in farm management databases has precluded empirical production models from explicitly accounting for differences in genetics across herds. The influence of genetics on milk composition is analyzed by splitting milk production into protein, fat, and other components. The article explores some modeling issues associated with the specification of the effect of genetics in this multi‐output technology framework. In particular, genetic indexes are considered as allocable inputs and the remaining inputs as nonallocable. Our results show that genetics have a significant impact on milk composition. In particular, we find that farmers’ income increases by 6.6% when genetic indexes are augmented by one sample standard deviation.